CN105884429B

CN105884429B - Sludge composting spiral layer tower

Info

Publication number: CN105884429B
Application number: CN201510402284.1A
Authority: CN
Inventors: 张万路
Original assignee: Beijing Lanlinsi Environment Technology Co ltd
Current assignee: Beijing Lanlinsi Environment Technology Co ltd
Priority date: 2015-07-10
Filing date: 2015-07-10
Publication date: 2022-08-30
Anticipated expiration: 2035-07-10
Also published as: CN105884429A

Abstract

A novel sewage tower type multilayer mud treatment device is of a cylindrical structure, and a rotary telescopic distributing machine taking the center of a tower as an axis is arranged at the top of the tower. The tower is internally provided with a plurality of layers of spiral sludge fermentation tanks, the tank wall is provided with a ventilation fan, the tank bottom is provided with a radiation beam bracket, and a glass fiber reinforced plastic clapboard is laid on the bracket. A drum stirrer capable of vertically ascending or descending is arranged in the tower. The worm discharging machine with rolling inner surface of the discharging port can load and transport the fermented sludge collected by the discharging port. Sludge compost revolves layer tower area little, and the sludge fermentation process is gone on in tower inside completely, and outside the tower can not revealed to the dust, the harmful gas that produces in the fermentation process can all be carried to deodorizing device, has reduced deodorizing device's load, and the position of feeding, the ejection of compact is concentrated fixedly, and the material pollutes the obvious reduction of the condition of external environment.

Description

Sludge composting spiral layer tower

Technical Field

The invention relates to a sludge composting device, in particular to a tower-type composting structure.

Background

The sludge treatment generally adopts methods such as incineration, landfill, composting and the like.

Wherein the composting process and equipment are as follows: the concrete fermentation tank is generally 90m in length, 3.0m in width and 3m in height, a track is arranged at the top end of the tank wall, and the turner can move (manually or automatically controlled) along the track. The material is conveyed to the tank body from one end of the tank body along the belt conveyor, a roller of the turner rotates and stirs in the material, the material is thrown for a distance (2-3 m) in the advancing direction, the turner advances along the length direction of the tank and turns and throws the material once, and sludge in the tank moves forwards integrally once, so that the operating frequency of the turner is controlled, and the time from the tank inlet to the tank outlet of the material can be controlled.

And a belt conveyor is arranged at the material outlet end, the fermented materials are conveyed to a screening machine through the belt conveyor, and the finished product parts can be packaged and transported outside for sale.

The bottom of the tank is provided with an air distribution plate and an underground gas transmission pipeline, and fans (generally four stages) are arranged at different positions in the length direction. The number of the tank bodies is calculated according to the design scale, each fermentation tank is arranged in parallel and connected, the turning machine finishes turning of one tank, the tank is automatically moved to the traveling vehicle to turn the next tank, and the operation is repeated in such a way, so that the operation can be automatically operated by a set program.

The materials can generate various kinds of stink or irritant gases (such as hydrogen sulfide, ammonia gas, methane and the like) in the fermentation process, and a huge factory building is required to be arranged for preventing the stink from diffusing to pollute the environment and meeting the requirements of heat preservation, rain prevention and the like. In order to prevent the concentration of the malodorous gas in the workshop from being too high, a fresh air fan needs to be arranged, and the foul gas in the workshop is continuously pumped to an external deodorization system by an air outlet fan for treatment, and can be discharged into the atmosphere after reaching the standard.

Due to harmful gases accumulated in the room, in the operation process of the normal maintenance process, an operator needs to bring an isolation breathing mask. The tumbling process produces a large amount of dust and low indoor visibility, especially in the steam room produced by winter fermentation, which is only a few tens of meters. In addition, the operation of the turner and the belt conveyor generates noise, the indoor environment is extremely bad, the material fermentation needs proper temperature, the indoor space is large, the proper temperature is difficult to reach (especially in winter), and the effect of the deodorization device is influenced. The fermentation tanks and the belt conveyor are arranged in a plane, so that the occupied area of the fermentation tanks and the belt conveyor is large relative to the ground.

Disclosure of Invention

The sludge treatment device aims to overcome the defects of poor operating environment, wide occupied area, high technical requirements on the turning and throwing machine and the like of the existing sludge treatment technology. The invention provides a sludge composting device which can isolate operating personnel from fermentation gas, reduce the floor area of a fermentation tank, reduce the volume of odor-discharged gas, reduce the load of a deodorizing device, cancel a turning machine with high technical requirements and a tank body and a track with high requirements on precision, and facilitate the control and increase of the temperature of a fermentation environment.

The technical scheme adopted by the invention for solving the technical problems is as follows: the concrete circular tower is arranged, the tower wall is used as the outer wall of the fermentation tank, the steel structure circular cylinder is arranged inside the concrete circular tower, and the cylinder wall is used as the inner wall. Horizontal glass fiber reinforced plastic grids (with holes) are laid between the outer wall and the inner wall, the partition plates are laid in a spiral mode to form a multi-layer spiral-surface tank bottom, and the tank bottom is provided with a discharging hole through which materials can pass.

A plurality of uniformly distributed stirrers are arranged in the fermentation tank, and transmission shafts of the stirrers pass through the through long holes on the inner cylinder. The inner side of the inner cylinder is provided with a fixed track which is spirally arranged in an ascending way, a driving device on the outer side of the transmission shaft sleeve is provided with a traveling wheel, the traveling wheel is matched with the fixed track to drive the stirrer to move along the track direction, and the change of the traveling direction of the traveling wheel drives the stirrer to horizontally move and interlaminar move.

The outer wall and the inner wall are provided with vent holes, the fan on the outer wall of the tower and the fan in the inner wall provide air for the fermentation tank through the vent holes, and the upper end of the inner cylinder is closed and is communicated with an external deodorization device through a deodorization air pipe.

The first layer on the upper part is a distributing groove, the mixed material (the mixture of the sludge, the straws and the return material) is conveyed to a rotary telescopic distributing machine on the top of the tower, and the material can be uniformly distributed in the circumferential range of the distributing groove under the action of the distributing machine.

The material falls to the lower floor's groove from the upper strata groove under the effect of stirring sword (the nature of material determines the material can not continuous a large amount of falling to the lower floor when not stirring).

In normal operation, according to changes of temperature, humidity, oxygen content of gas and the like, the rotating speed of the fan is adjusted so as to adjust air inflow or air discharge, and the frequency of the stirrer is adjusted through fermentation conditions.

The lowest layer is a material (after fermentation) discharging area which is provided with a worm discharging machine rotating by the center of the tower. Even if the upper material is stirred when the lower layer has no space, the material will not fall to the lower layer. The adjustable ejection of compact speed of rotational speed and the start-stop time of adjustment ejection of compact machine, ejection of compact belt feeder is set up to the ejection of compact machine, carries the material to outside screening machine.

The beneficial effects of the invention are:

1. the fermentation tank is of a vertical multilayer structure, so that the floor area of the fermentation tank is greatly reduced.

2. The upper part is closed in the normal operation of the fermentation, and the gas flows from bottom to top, and all the odorous gas generated in the fermentation is conveyed to the deodorizing device.

3. The stirring of the mixture is completely carried out in the interior, and the inside dust can not be revealed to the fermentation tower outside.

4. The position of collecting the deodorization gas is greatly concentrated, the volume of the deodorization gas is greatly reduced, and the load of the deodorization device is reduced.

5. The feeding and discharging positions are centralized and fixed, and the condition that the material pollutes the external environment is obviously reduced.

6. The simple stirrer replaces a turner with complicated technology. (turning machine is the main import)

Drawings

FIG. 1 is a schematic view of a conventional sludge treatment technique

FIG. 2 is a layout diagram of a fermentation tank bottom plate of a sludge composting spiral layer tower

FIG. 3 is a layout of a glass fiber reinforced plastic grid

FIG. 4 is a schematic view of a blender and its driving device

FIG. 5 is a layout of a rotary telescopic distributing machine and a distributing chute

FIG. 6 is a schematic view of the discharge zone

FIG. 7 is a schematic view of an embodiment of the present invention

In the figure 1, a rotary telescopic distributing machine 2, a cylinder outer wall 3, a cylinder inner wall 4, a fermentation tank bottom plate 5, a stirrer 6, a driving device 7, a worm discharging machine 8, a deodorizing device 9, a vertical conveying device 10, a process fan 11, a truss 12, a discharging belt conveyor 13, a deodorizing air pipe 14, a rotary layer tower main body 15, a track 16 and a discharging port

Detailed Description

According to the embodiment drawings shown in figures 2-7, the fermentation tower body adopts a cylindrical concrete outer wall, and the interior of the fermentation tower adopts a steel structure cylinder as an inner wall. The radiation beams are laid between the outer wall and the inner wall of the tower, the radiation beams are spirally and upwards laid (figure 2), a glass fiber reinforced plastic grating is laid on the radiation beams (figure 3), and the outer wall, the inner wall and the bearing radiation partition plate of the tower form a fermentation tank. The fermented material can fall to the next layer of fermentation tank through the blanking hole on the clapboard under the action of stirring and gravity.

The top of the fermentation tower is provided with a rotary telescopic distributing machine 1 which can evenly distribute materials in a distributing groove in the circumferential range, and a structural truss 11 (shown in figure 5) is arranged above the distributing machine.

Open the wind hole on every layer of fermentation tank outer wall and inner wall, install ventilation fan and intercommunication pipeline on the ventilation hole, adjust the amount of wind through the rotational speed of control fan, and then adjust the fermentation tank and contain oxygen content and temperature, humidity etc. can also discharge the interior stink that produces because of the fermentation of inslot into the inner tube, and the stink of being discharged into the inner tube will all carry deodorizing device 8 through the suction effect of deodorization tuber pipe 13.

A plurality of agitators 5 are stacked and assembled together in the tower inner cylinder to form an agitation system. The motor of each stirrer drives the roller to rotate through the speed reducer to stir the materials in the fermentation tank (figure 4). Each stirrer is provided with an independent driving device 6, and the driving devices of the stirrers work synchronously to drive the stirring system to walk on the spiral track 15 in the tower, so that the operation requirements of horizontal advancing and ascending or descending are met.

The material from top of the tower distributing chute through every layer of fermentation tank whereabouts to the discharge gate 16 at the bottom of the tower and accomplishes a fermentation cycle, and the effect of rethread worm ejection of compact machine 7 makes the material that ferments fall ejection of compact belt feeder 12 (fig. 6), and the ejection of compact belt feeder is carried the material to outside screening plant and is sieved.

Claims

1. A tower sludge composting treatment device comprises a material distribution device, a fermentation tank, a stirring device and a discharging device, and is characterized by a vertical multilayer structure, wherein the whole fermentation process is carried out in a closed structure; the tank bottom spiral-lifting fermentation tank is characterized in that the fermentation tank is spirally lifted, a radiation beam is laid at the tank bottom of the fermentation tank to serve as a bearing structure, a glass fiber reinforced plastic grid is laid on the radiation beam, blanking holes are formed in the glass fiber reinforced plastic grid, a circular cylinder is arranged at the center of the tower type sludge composting treatment equipment, a fixed track which is spirally lifted and arranged is arranged on the inner side of the circular cylinder, the fixed track is used for the horizontal and interlayer operation of the stirring device, and the stirring drum of the stirring device is stirred and advances at the middle lower part of the material.

2. The tower-type sludge composting apparatus of claim 1 wherein a process blower for ventilation and oxygen supply is provided on the wall of the fermentation tank.

3. The tower-type sludge composting apparatus of claim 1 wherein the agitator is a mixer common to the multi-layer fermentation tanks, and the driving and traveling means is separate from the materials.